package string;

/**
 * 测试StringBuilder修改字符串的性能
 */
public class StringBuilderDemo2 {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder("a");
        for (int i = 0; i < 1000000; i++) {
            sb.append("a");
        }
        System.out.println("执行完毕");
    }
}







